Suction nozzle



'May 4 1943- G. E. LOFGREN y i Y 2,318,317

SUCTION NOZZLE Filed NOV. 28, 1939 2 Sheets-Sheet l V j l INVENTOR. BY M w mfrz .May 4, 1943 G. E. LOFGREN 2,318,317

SUCTION NOZZLE Filed Nov. 28, 1959 2 sheets-sheet 2 I 1NVENTOR 14'. 4 A BY Patented May 4, 1943 UNITED STATES PATENT OFFICE SUCTION NOZZLE Gustaf Einar Lofgren, Riverside, Conn.,` assigner to Electrolux Corporation, New York, N. Y., a corporation of Delaware Y Application November 28, 1939, lSerial No. 306,448 A 9 Claims.

My invention relates to suction nozzles and more particularly to ya suction nozzle of the type connected toa suction producing device by a flexible hose or conduit.

An object of my invention is to provide an member 2l engages elbow 2| to produce av resistance by means of friction to free movement of elbow 2| and to hold it in any desired posil tionwith respect to the-nozzle I0, Spring memimproved suction nozzle, in which the handling the following specification and 'appended claims when considered in connection with the accompanying drawings, in which Fig. 1 is a front view of my improved suction nozzle cut away in part to show the internal construction; v

Fig. 2 is a sectional view taken along the line 2--2 of Fig. 1;

Fig. 3 is a detail sectional View taken along the line 3-3 of Fig. 2;

Fig. 4 is an exploded view showing parts of the suction nozzle in position for assembly;

Fig. 5 is a sectional view similar to Fig. 2 showing a modied form of construction;

Fig. 6 is a view showing the suction nozzle :ut away in part to expose the swivel construcion;

Fig. 7 is a detail sectional view taken along the line 'of Fig. 5; and

Fig. 8 is a perspective viewof a friction spring.

Referring to the drawings, IIJ indicates generally a suction nozzle having a base II and a top cover member I2. Base I I has a, central suction opening I3.` Along the front and rear edges of base I I, brush bristles I4 are secured in recesses I5 provided therefor. Extending around the outer edges of base II is a rubber bumper I6, which is positioned between the base II and .ber 21, in addition to providing a frictional means for holding the elbow 2| in a particular position, also locks the elbow 2| to the socket lmembers I8 and I9 by extending into the annular recess 26.

In the assembly of the suction nozzle, as best indicated in Fig. 4, the socket members I8 and I9 and the hood 23 are first secured to the base II'. The elbow 2| is then inserted with the portion 22 extending through the socket members I8 and I9. The spring 21 is snapped in position in the recess 26. The cover member. I2 is then secured to the base |I by the screws I.'| with the bumper I6 located 4in position between the outer edges yof the base |I and cover I2. The brush bristles I4 may be inserted .in the base II either before or after the above assembly is completed.

-In a modified form of construction, as shown in Figs'. 5 to 8, a narrow annular recess 28 is provided in the portion 22 of the elbow 2'I. A split ring 29 is located in the recess 28. A spring member 30 is located between the bottom of the portion 22 of elbow 2| and the base I-I. Spring 30 is provided with a longitudinal slot 3| which is adapted to receive the ring 29. In this construction, the locking of the elbow to the base II isV accomplished by the combination of the split ring 29 and the spring 30. The frictional -the top cover I2. The cover I2 is secured to the base II by means of screws I'I. Two yspaced socket members vI8 and I9, as best indicated in Fig. 4, are secured to the base II. A strap 20 ,connects the tops of the socket members I8 and I9 to hold them in spaced relation.

Socket members I8 and I9 are adapted to receive an elbow 2|, provided for the connection of a tubular hose, or conduit member, communicating with a-source of suction. Elbow 2| is substantially a degree elbow with a portion 22 extending within the socket members I8 and I9. The interior of elbow 2l isconnected to the suction opening |3-by means of a hood 23 secured to base I I. Hood 23 has a turned'over edge 24 engaging a shoulder 25 on socket I8 for providing an air tight connection to the elbow 2|. The portion 22 of elbow 2| is provided with an an' nular recess 26. A substantially U-shaped spring contact for holding the elbow in a selected position with respect to the base |I is accomplished by the spring 36.. l

The assembly of this construction is substantially the same as the assembly of the form of the invention illustrated 'in Figs. 2 to 4, with the difference that the split ring 29 is located on .the elbow 2| before it is inserted in position, and the spring 3 may be positioned either before or after the elbow 2| is inserted in the socket members I8 and I9. The` springs 21 and 36 in the two forms of construction make it possible to provide a relatively free movement between the elbow 2| and the sockets I8 and I9, so that it is not necessary to hold these parts to close tolerances.. If it were necessary to hold' these parts to close tolerances, considerable diiiiculty would be experienced in binding when the minimum tolerances 'were obtained. The combination of .the springs 2 1 and 30 with the annular recess 26 and the split ring 29 also serve to lock the parts together and prevent relative longitudinal movement between the elbow 2| and the base I. The

and the base I I is desirable to permit the linter-- tion of the. suction nozzle beneath alow piece of furniture or in relatively confined quarters.

While my invention has been illustrated in speciiic embodiments, it must be understood that the invention is not limited to .the exact con-- struction illustrated, but variations may be made within the scope of the appendedclaims.

What I claim is:

1. In a suction nozzle, a base having an opening, a first socket member secured to said base, a second socket member secured to said base in spaced relation to said first socket member, a

hood secured to said base communicating with said opening and with the interior of said first shaped socket members fixed to one of .said bodies socket member, an elbow journalled in said socket members, and means for locking said elbow to said socket members comprising a spring frictionally engaging said elbow and fixed with respect to said base adapted to restrain relative rotation therebetween.

2. In a suction nozzle, a base having an opening, a rst socket member secured to said base, a second'socket member secured to said base in spaced relation to said first socket member, a hood secured to said base communicatingwith said opening and with the interior of said socket member, an elbow journalled in saidlsocket members and having an annular external recess, locking means located in said recess and positioned between said socketmembers, and a spring frictionally engaging said elbow and xed with respect to said base adapted to restrain relative rotation therebetween.

3. In a suction nozzle, a base having an opening, a first socket member secured to said base, a second socket member secured to said base in spaced relation to said first socket member, a

hood secured to said base communicating with said opening and with the interior of said first socket member, an elbow iournalled in said socket members and having an annular external recess, a ring seated in said recess and vpositioned between said socket members, and a spring frictionally engaging said elbow and xed with respect to said base adapted to restrain relative rotation therebetween.

4. In a suction nozzle a hollow body having a coupling opening and a suction inlet adapted to be placed over a surface to be cleaned, an elbow I 'pipe body having, a coupling opening and an outlet adapted to be placed in communication with a source of suction, means for coupling said bodies to form a continuous passage from one body to the other, and spring friction means engaging said bodies, said friction means and said first-mentioned means co-operating to permit relative rotation of said bodies only when vthe frictional force produced by said friction means is overcome.

5. A hollow body having an inlet and an outlet, a second hollow body having an inlet and an outlet, ring-shaped socket members fixed to one of said bodies over its outlet spaced apart `axially from one another, the inlet end o f the other body lying within said socket members and having an annular external recess in alignment coupling opening and a suction inlet adapted tov with the space between said socket members, and

means comprising a ring segment lyingin said recess having a projection beyond the recess into the annular spacel between the socket members and Aa spring fixed with respect to said socket members having a portion'projecting into said annular space and pressing'against the inlet end over its coupling opening spaced apart axially from one another, the coupling opening end of the other body lying within said socket members and having an annular external recess in alignment with the space between said socket members; and means comprising a ring segmentlying in said recess having a projection beyond the re cess into the annular space between the socket members and a spring fixed with respect to'said socket members having a portion projecting into said annular space and pressing against the coupling opening end of said other body, said means permitting relative rotation between said bodies only when the frictional force between the spring and said other body is overcome.

7. A hollow body vhaving an inlet and an outing against said recess, said means permittingA relative rotation between said bodies only when the frictional force between the spring and said other body is overcome.

' 8. In a suction nozzle a hollow body having a be placed over a surface to be cleaned, an elbow pipe body having a coupling opening and an outlet adapted ,to be placed in communication with a source of suction, means for .coupling said bodiesto form a continuous passage from one body to the other, and spring friction means engaging said bodies, said friction means and saidrst-mentioned means co-operating to permit relative rotation of said bodies only when the frictional force produced by said friction means" is overcome, said coupling .means comprising a female part mounted on the hollow body and supported in addition to its connection to the coupling opening of the hollow body by means directly connected to the suction inlet.

9. In a suction nozzle a hollow body having a coupling opening and a suction inlet adapted to be placed over a-surfaceto be cleaned, an elbow pipe body having a coupling `opening and an outlet adapted to be placed in communication with a source of suction, means for coupling said bodies to form a continuous passage from one body to the other, and spring friction means engaging said bodies, said friction means and said first-mentioned means co-operating to permit relative rotation of said bodies` only when the frictional force produced by said friction means is overcome, and-a member secured to one of said bodies adapted to cover said coupling and said spring friction means.

GUSTAF EINAR LOFGREN. 

